Three-way cock.



No. 862,733, PATENTBD AUG. 6, 1907.

' 1:.4 A. HALL.

THREE WAY. COCK.

APPLIOATION FILED me. 29, 1904. Bmmwsn un. 4. 1907.

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PATENTED AUG. 6, :1907,

E; A.'HALL. THREE WAY 000K. APPLICATION FILED AUG. 29, 1904. BENEWED JAN. 4. 1907.

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UNrTnn `STATES PATENT OFFIOE.

EDWIN A. HALL, OF HYDE PARK, MASSACHUSETTS, ASSIGNOR TO AIRIFIED GAS HEATING AND POWER COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF ARIZONA TERRITORY.v

THREE-WAY COCK.

Specification of Letters Patent.

Patented Aug. 6, 1907.

Application filed August 29, 1904, Serial No. 222,628. Renewed January 4,1907. Serial No. 350,821.

To all whom it may concern:

Be it known that I, EDWIN A. HALL, of Hyde Park, in the county of Norfolk and State of Massachusetts, have invented certain new and useul Improvements in Three-Way Cock-s, of which the following is a speciiication.

This invention relates to cocks adapted to direct an impelling fluid under pressure alternately in different directions to instrumentalities such as two alternatelyacting hydraulic motors, and expelling the exhaust of the impelling fluid from each instrumentality or motor when the impelling fluid is admitted to the other. y

The invention is here shown as embodied in an apparatus for forcing air or air and gas continuously to a mixing-chamber by an alternate action of two pumps, each of which comprises an inverted air-receiving bell which is raised by the introduction of water under pressure into a hydraulic motor, and is released by the connection oi the motor with an exhaust passage.

The invention consists in the improvements which I will now proceed to describe and claim.

Oi the accompanying drawings, forming a part of this specification,-Figiu'e l represents a partial sectional view and partial side elevation of a three-way cock embodying my invention. Fig. 2 represents a section on line 2 2 of Fig. l. Fig. 3 represents a section on line 3 3 oi Fig. l. Fig. 4 represents a side elevation showing my improved three-way cock applied t0 an air-forcing or pumping apparatus.

The same reference characters indicate the same parts in all the figures.

In the drawings,-a a/ represent two tanks, each open at its upper end, and adapted to hold a. body of water.

b represent inverted air-pumping tanks or airbells, each open at its lower end, the said bells being movable vertically in the tanks a a, and sealed at their lower ends by the water in the tanks, each tank and .bell constituting an air-pump. Into each bell extends an air-induction pipe c open to the atmosphere at the bottom of the tank, and extending above the sealing liquid, the said pipe having valves at its upper portion, adapted to permit the entrance of air to the bell, and prevent the escape of air from the bell, through the pipe c. From each bell extends an airoutlet pipe d, which passes through the 4bottom oi the tank and communicates with the bell above the sealing liquid. Each bell is alternately raised to draw air through its induction-pipe, and released and allowed to descend from its raised position to force the air through the outlet-pipe, this being effected by hydraulic motors in the tanks a a. Each motor comprises a cylinder e alixed to the bottom of the tank, a

piston e/ in the cylinder, and a rod e2 extending through a stulng-box at the upper end of the cylinder and secured to the head of the bell. Water under pressure is alternately admitted to and shut off from the cylinder, the water raising the piston and the bell connected therewith. When the water is shut off from the cylinder, a vent from the latter is opened, so that the water in the cylinder is released, and the piston and bell are allowed to descend, the descent of the bell forcing the air through the outlet-pipe. The two motors are operated alternately, so that when one air-bell is rising, the other is descending. To this end, water is admitted. to the cylinders e e, alternately, by the means next described.

g represents a valve-casing having an inlet-branch g connected by a pipe g12 with a source of supply of water under pressure, and supported by a standard g2 in suitable proximity to the tanks a a. The valvecasing g is provided with two oppositely extending y Outlet-branches g3 g4, one of which is connected by a vpipe g5 with the cylinder in the tank a, and the other by a pipe g6 with the cylinder in the tank a. The branch g3 is connected by a waste-passage gT with one side of the valve-casing, while the branch g4 is connected by a waste-passage gS with the opposite side of the casing, the waste-passages communicating with the casing at different distances from the branches g3 g4, A

which are in alinement with each other.

g9 g10 represent waste-outlets in the casing g, the outlet 79 being operatively related to the waste-passage g", while the outlet gl0 is operatively related to the waste-passage g8.

7L represents a cylindrical valve fitted to rotate in the casing y and provided with a passage h/ (Fig. 3) adapted to connect the inlet-passage g with either the outlet-branch g3 or the outlet-branch g4, a quarter'- rotation oi the valve being sufficient to change the connection. The valve has a pair oi waste-ports h2 h3, adapted to register respectively with thel waste-passage g7 and the waste-passage gg. The valve also has another pair oi waste-ports h4 h5, adapted to register respectively with the waste-passage gS and the waste-outlet g1". The valve is chambered, to connect the ports of each pair, as shown in Fig. 2. The valve is partially rotated during the upward movements oi each air-bell, by mechanism hereinafter described, the organization being such that when one bell approaches the extreme of its upward movement, the valve is turned to shut off the impelling water from the motor o that bell, and at the same time connects said motor with one of the waste-outlets, the valve also at the same time admitting water to the motor oi the other air-bell, and disconnecting the last-mentioned motor from the cork:- sponding waste-outlet, so that each bell commences to rise when the other commences to descend. When the valve is in the position shown in Figs. l and 3, the

inlet-branch g is connected by the valve-passage hf with the outlet-branch g`L communicating with the cylinder oi the motor in the tank of, and the cylinder ot the motor in the tank a is connected through the waste-passage g7 of the casing and the ports h2 h3 oi the valve, with the waste-pipe g. When the valve is in its opposite position, the inlet-branch g is connected by the valve-passage h with the outlet-branch g3 communicating with the motor cylinder in the tank a, the motor cylinder in the tank a/ being connected through the waste-passage gs ot the casing and the ports h4 h5 oi the valve, with the waste-pipe gw.

The mechanism for turning or shifting the valve is described as follows: if i2 are three arms radiating from a hub i3, which is adapted to turn on a short shaft j, to which is allxed a bevel-gear jf. The arms t' i2 project in opposite directions, and are at right angles with the arm t. Each of the arms i i2 has a stud t4 at its outer end, adapted to engage a dog i5, which moves with the adjacent air-bell. Each bell carries a dog t5, which is connected with the bell by a rod t aiiixed to an arm 'i7 on the upper portion of the bell and movable in guides t8 on the corresponding tank. The bevel-gear j/ on said shalt meshes with a bevel-gear j ailixed to the stem ot the valve h. The central arm t" has an extension i9 pivoted to it at il", said extension having a weight i12. The arm t" also has two oppositely extending projections t, adapted to abut against fixed stops 15 il at opposite sides oi the center ot oscillation oi the arm. Y-

I will assume that the bell b in rising has cause its dog if to engage the stud t4 on thc arm i2. The movement imparted to the dog while it is engaged with said stud is suflicient to move the arms t' i t2 and extension "i9 from the position shown in Fig. 1, toward the position shown in Fig. 4, the arm i being moved in the direction of the arrow in Fig. l, until the weighted extension has crossed the center of motion, whereupon, the said extension and the connected parts move by gravitation to the position shown in Fig. 4. The gear j/ has a stud 9'5, which projects between the arms 11/ and i2. When the said arms are in the position shown in Fig. l, the arm if bears against said stud, the latter being separated from the arm i2; consequently during a part o the above-described movement of the connected arms, the stud j and gear j/ remain stationary, the arrangement being such that the arm i2 strikes the stud during the latter or gravitating portion of its movement, and gives the gear a suitable partial rotation to shift thc valve from one position to the other. The arm 1l its extension t9, and the arms t' t" constitute a gravity motor which is set for action by the rise of the bells b b, and then operates by gravitation independently o said bells. The provision afforded by the stud .7'5 and arms i t2 for a considerable movement or" said motor beiore it engages and moves the gear j enables the motor to have a movement of suicient amplitude, and to move the valve quickly during the latter part only of its movement. The pivotal connection between the arm i and the weighted extension i9 enables the extension to move to a limited extent, independentlyoi the arm, the extension swinging on the pivot il to the extent permitted by shoulders @'20 on the extension and the projections 13 im on the arm. This independent movability of the extension increases its momentum during the gravitating movement o the motor.

The construction shown in Fig. 4 is a part oi an apparatus for mixing air and gas set forth and claimed in another application for Letters Patent of the United States tiled by me August 25, 1904, Serial No. 222,103. I do not however, limit myself to the use of the improved three-way cock above described in said apparatus, as the said cock may be used ior any other purpose to which it may be found applicable.

I claim:

l. A three-way cock comprising a casing having an inlet-branch communicating with a source of fluid-supply, two outlet-branches communicating with said casing at points coinciding with the inlet-branch, and two wastepassages connecting the outlet-branches with the casing at different distances from the inlet-branch, a rotary valve in said casing having two chambers at different distances from the inlet-branch, each chamber having two wasteports, and means for rocking or partially rotating the valve.

2. A three-way cock comprising a casing having an inlet-branch communicating with a source of fluid-supply, two outlet-branches communicating with said casing at points coinciding with the inlet-branch, and two wastepassages connecting the outlet-branches with the casing at different distances from the inlet-branch, a rotary valve in said casing having two chambers at dierent distances from the inlet-branch, each chamber having two wasteports, a gear aixed to the stem of said valve, an operating gear meshing therewith, an oscillatory lever adapted to partially rotate said operating gear in opposite directions, and means for oscillating said lever.

3. A three-way cock comprising a casing having an inlet branch communicating with a source of uid supply, two outlet branches extending from said casing, and two waste passages connecting the outlet branches with two waste outlets in the casing, a rotary valve in said casingl adapted to connect the inlet branch of the casing with the two outlet branches alternately and to connect the waste passages ot' the casing alternately with the wasteoutlets, an operating member j' geared to said valve and having a stud 0r projection i5, a pivoted weighted lever having means for engaging said stud, and means for moving said lever' into position to operate by gravity.

In testimony whereof I have affixed my signature, in

presence of two witnesses.

EDWIN A. VHALL.

Witnesses:

C. F. BROWN, E. BATCHELDER. 

